Loom for weaving bags.



A; L. MCHEL.

L FOR WEAVNG BAGS. APPLICATION ULEB JUNE 7, 1909.

3 SHEETS-SHEET 1.

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A. L. MICHAEL. LOOM FOB. WEAVING BAGS. APPLIOATIOH $11.111? JUNE 1,1909.

Patented Ma1229, 1910.

3 SHEETS-SHEET 2.

A. L. MICHAEL. LOOM FOR WEAVING BAGS.

APPLIUATIOI FILED JUNE 7, 1909.

NETE@ STA ES PATENT FFCE.

v ARTHUR L. MICHAEL, F HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DBAPER COM-PANY, OF HO?EDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

LOOM FOB WEAVING BAGS.

assess.

To all whom it may concer/a.'

Be it known that l, ARTHUR L. MICHAEL,

a citizen of the United States, and residentrv of Hopedale, county ofl/Vorcester, State of Massachusetts, have invented an Improvement inLooms for leaving Bags, of which the following description, inconnection with the accompanying drawing, is a specification, likecharacters o-n the drawing reptween two adjacent tubular' sections, ifthe dined, resulting in a better latter are long enough to form twobags, or the separating cut may be made across each tubular sectionadjacent the bottom strip,

'when the length of each tubular section is only sutiicient to form onebag.

Looms. of the character referred to are commonly termed bag looms, andare provided with a set of four harnesses, which by means of suitablecams and connections are given a 3 up, l down, l up, 3 down, motion tofornithe tubular fabric, and an auxiliary camis thrown into operation atthe proper timeto change the regular sequence or cycle of the harnesscycle and effectthe weaving of the strip of fabric which isto form'thebag bottom.

Heretofore there has been considerable indefiniteness in the control ofthe change cam as it may be termed, owing to the gradual movementthereof into inoperative position, so that the strip of connectingfabric has not been as sharply defined as it should be.

My present invention has for its object the production, in a bag loom ofthe type specified, of means to positively and quicklyeffect the controlof the change cam so that the intermediate or lbottom strips of fabricshall be of an exact length, and well deroduct. I have also providedmeans where y the length o the intervening strip may be.varied, theadjustment whereby such variation is secured being e'ected readily andquickly.

Specication of Letters Patent.

Application tiled June '7, 1909.

atented Mar. 29, tf.

Serial No. 500,565.-

The various novel features of my invention will be fully described inthe subjoined specification and particularly pointed out in thefollowing claims.

Figure l is a transverse section and partial left-hand side elevation ofa suflicient portion of a bag loom to be understood, with one embodimentof my present invention applied thereto, the mechanism being shown asweaving a tubular section and `nearly ready to change for Wea'ving anintermediatef or bottom strip of fabric; Fig. 2 is a rear elevation of aportion of the apparatus, shown in Fig. l, illustrating more clearlycertain novel features of my invention; Fig. 3 is a top plan ,viewthereof, showing the regular harness cams and their treadles, the changecam, and the control. ling means whereby the latter is shifted into andout of operative position Fig. i is a detail taken on the line i, Fig.3, and looking toward the right, of a portion of the change camcontrolling means; Fig. 5`is an enlarged side elevation of the regu larshedding and change cams, and showing a portion of the treadle and thefollower thereon with which the change cam coperates; Fig. 6 is asectional detail taken on the line (3 6, Fig. 5, to be referred to; Fig.7 is a perspective view of a portion of the fabric woven on.tlie loom;Fig. 8- is a longitudinal and diagrammatic section through the fabric,showing more clearly the mixed weave which forms the bottom orintervening strip of fabric between each two adjacent tubular sections.

Referring to Fig. l the four harnesses H', H2, H3, H4, their connectedtreadles T, T2, T3, T4, all fulcrumed at Tx at the back of the loom; thefour regular shedding cams I, Il', lll and IV, set to operate m a lixedcycle, and also shown in Fig. 5 in their relative position on the camshaft Cf, and the change cam V loose on said shaft and rotating with thesame by means of the' lateral pin o slidably entering a hole in the camlV, Fig. 3, thecam V having `an annularly grooved hub a, are all ofsubstantially well known construction, the shedding cams being set onthe shaft to ordinarily effect the 3 up, l down motion of the harnessesfor the formation of the tubular sections T, T of the fabric, Figs. 7and 8. A gear C on the cam shaft Cx is driven by gears C', C? from theshaft C, Fig. 1, the latter being actuated as usual from the drivingshaft of the loom and forming no part of my present invention.

I have indicated in Fig. 1 a portion of the take-up mechanism, thetake-up ratchet D having -an attached pinion D" which drives a gear lD2having an attached pinion D3 in turn meshing with a gear D4, (said gearsand pinions being indicated by dotted double circles) the gear D4 beingconnected with and effecting the rotation, in the direction of the arrowand at a slow speed, of a measuring member Dx, shown as adisk having anotch d in it-s periphery. The

gearing between the take-up mechanism and the measuring memberconstitutes a speed reducing mechanism, as will be manifest. The leadingside of the notch is radial, and the opposite side d, is cam-shaped togive a gradual rise from Ithebottoin of the notch 'to the periphery ofthe disk.

A bevel-ended latch 1 inside of the lefthand loom side, (partly shown inFig. 1) is extended rearwardly and pivotally connected at 2 with an arm3 of a bell-crank, Fig. 3, fulcrumed at 4 on a part of the loom frameand acted upon by a suitable spring, as 5, to normally hold the free endof the latch against the periphery of the measuring member D", as inFigs. 1 and 3.v The front end of said latch is. slidable in a guide 6vertically adjustable on a ixed bracket 7 by means of a set-screw 8,Fig. 1, working in a slot 9 of the bracket. By setting the guide higherthe beveled end of the latch 1- will be raised, to thereby enterthenotch d earlier, but it will not move so far into the notch as it willengage the cam-shaped side d', thereof nearer the periphery'of the 40member D c and hence will be sooner moved out of the notch by thecontinued rotative movement of the measuring member. This adjustment, aswill appear hereafter, en-

ables me to change from tubular weaving.

sooner than would otherwise be the case, but the bag-bottoming strip(woven during the time the latch is in the notch d) will be terminatedsooner. The bell-crank arm 10 is bent up and extended rearward above thecross-girth A .of the loom from which thev harness-treadles are hung,and is pivotally connected at 11 with a peculiarly bent link orcontroller, the shape of which is very clearly shown in Figs. 2 and' 3,the three straight portions 12, 13 and 14 being in parallelism but indifferent horizontal planes. As shown the part 12of the controller isabove the girth A* while the other parts are back of it, the part 13being slid- I ablymounted in a fixed support and guide 15, while thepart 14^carries two horizontal, rearwardly extended pins 16, 17, whichenter elongated slots in two depending jacks 18, 19 pivoted at theirupper ends on a segmental shifter 20, fulcrumed on'the girth AX at 21,Fig. 2, the fulcrum being below and between the points at which thejacks and the shifter are connected. A link 22 is pivotally andeccentrically connected at one end with the shifter and at its-other end7.3 it is jointed to one arm of a yoke-lever 23, having a fixed fulcrumat 24, and operatively connected with the grooved hub lv of the changecam V. The latter is shown in inoperative position, Figs. 2 and 3, but75 when the link 22 is moved to the right the yoke-lever 23 will beswung on its fulcrum to move or shift the cam V into operative positionnearer to the cam IV of the set of shedding cams. Thus the segment 20and 80 the intervening connections between it and the change camconstitute shifting means therefor by which it is shifted fromoperativeto inoperative position, and vice versa, and the shifting means ispositively actuated, v as will be described, by a single actuatingdevice, the time of such actuation being controlled through theinstrumentality of the measuring member DX, the latch 1, and the link orcontroller moved thereby. At the lower end of the jack 18 is a hook`18",Fig. 2, while an adjustable hook 19X is carried by the jack 19, and isheld in adjusted position by a bolt 25 passing through a slot 26 in ,thehook, the latter being shown as a laterally movable blockv supported inthe recessed part of the jack 17.

Bearings 27 on the girth A? support a shifter actuating rock -shaft 28having a rigid arm 29 connected by a link 30, Fig. 4,

with a wrist-pin 31 on a disk 32 fast on the .end of the cam shaft CX,whereby the rockshaft is constantly oscillated, when the loom is inoperation, in time with the'rotation of the cam shaft. Said rock-shaftis provided with radially extended actuating fingers 33, 34, which arearranged to cooperate respectively with the jacks, 19, 18 according t ovwhich of said jacks is operatively positioned, such positioning beingeffected by 11o movement of the bent vcontroller to change the positionof the pins 17 and 16 and the jacks governed thereby.

The cohstantly oscillating rock-shaft 28 and its rigidly attachedfingers 33, 34', con- 115 stitute a single actuating device for the'cam-shifting means, for by said device the segmental shifter 20 isrocked in one direction. to operatively position the cam V, or in theother direction to move said cam to in- Voperative position, thecontrolling instrumentality governing' the 'coperation of the actuatingdevice with the shifter 2() and determining in which direction it is tobe moved by such actuating device.

In the relative position of the parts shown herein', see particularlyFigs. 2y and 3, the

llatch 1 acts through the controller topositionthe jack 19 operatively,with its hook 19Xat the lower end of the path of the ac- 1.30

eesse y tuating` finger 33, (which has previously engaged said hook andpulled down the jack 19 and 'turned the shifter 20 to the positionshown) the change cam V being positioned inopcratively, so that theregular bag weave is carried on, forming a tubular section 'l of thefabric, Figs. 7 and 8. iVhen the latch 1 enters thenotch d in themeasuring member thc spring 5 at once moves the controller 12-14 to theright, 2 and 3, thereby swinging the jack 19 into inoperative npositionand moving the hook 13X of jack 18 into position to be engaged anddepressed by the finger 34.- on its downward stroke. This down-pull onthe jack 18 swings over the shifter Q0 to the right, Fig. 2, and throughthe link 22 and yoke-lever 23 the change cam V is nioved toward theadjacent shedding cam' iV, into operative position. y

Referring to Figs. 5 and 6 the treadle 'lf4 has a. housing t in whichisfseated a non` rotating stud t having a cylindrical part t2 on whichrotates a follower-roll t for the cam 1V, the outer end of the studhaving an enlarged and substantially semi-circular head t5 whichconstitutes a follower to cooperate. with the change cam V whenoperatively positioned. rlhe socket t3 for the outer end of the stud tis clearly shown in Fig. 5, whereby the stud is prevented from rotating.

Remembering that the change cam V rotates with the rother or regularshedding cams, it will be seen by inspection of l? ig. 5 that when thechange cam is operatively positioned the treadle Tt and its harness Htwill be held down for two successive picks, first by the action of cam1V on the follower roll t4, and then by the cam V acting on the followert, thereby changing the harness motion from the 3 and 1 movement to 2up, 2 down, breaking up the tubular or bag weave, and making a plainweave for one pick. Thereafter the cams l. 11, 111 and 1V operate theharnesses for three picks with the 3 and 1 motion, and onv the fourthpick the regular cycle is again broken up and the plain, or 2 and 2,weave is formed, this mixed weave being continued while the latch 1 isin the'notch or recess (l of the ling member DX measuring member, suchmixed weave forining the connecting strip or bag bottom Tl",

Fig. 7.

1 have'endeavored to illustrate the above described operationdiagramniatioally in Fig. 8, the long vertical-lines p4 indicating everyfourth pickin which the change cam V breaks up the bag weave, while eachset of three intervening short vertical lines p* indicate the threepicks with the 3 and 1 or rThe slow speed of the measurcauses the end ofthe latch 1 to travel slowly over the inclined or camshaped side 03 ofthe notch 0l, first moving bag weave.

the jack 18 to the left, Fig. 2, out of the control of the actuatingfinger 34, and thereafter the jack 19 is moved to effect coperationbetween its hook 19X and the finger 33. At once the jack 19 is pulleddown, and the shifter 9.0 is swung to the position shown, acting tosimultaneously throw the change cam V out of operation, that is, to oneside of the follower t5, and immediately the regular tubular or bagweave begins. r1`here is no gradual movement of the change cam, but thequick and positive actuation of the shifter 20 acts instantly throughthe intervening parts of the shifting means to throw the change cani outof operation, and the mixed weave T10 constituting the bag bottom isterminated definitely and exactly and the adjacent tubular sectionisdelinitely begun. Consequently each bottom section T1 will be ofuniform length, clearly defined, and the fabric as a whole improved.

As has been stated, the lifting of the free end of latch 1 by the guide6 causes it to enter the notch d sooner than it would otherwise, and itwill be moved out sooner by the side d', thereby reducing the length ofthe bottom strip T1".

By moving the hook 19X to the left, Fig. 2, with relation to its jack19, the length of the bottom strip in the fabric will be shortened,because the finger 33 will coperate with said hook as quickly as desiredafter the'hook 18X isinoperatively positioned, so that the return to bagweaving willbe effected before the latch 1 has left the notch in themeasuring member. T)This adjustment can be made within quite a widerange, permitting tirely independent of the adjustment of the guide 6,referred to. The latter adjustment advances the beginning of the strip,and hastens its termination, while adjustment of the hook 19 docs notadvance the beginning of the strip but does hasten its termination, sothat either adjustment may be employed, or the two can be combined, ifdesired.

The shifting means for the change cam is positively actuated, to move orshift said cam quickly into and out of operative position, and theactuating device for said means isr` controlled by or through themeasuring member and the controlling instrun'ientality governed thereby,while the timing of such instrumentality can be readily1 adjusted tovary the length of the strips between the tubularA sections of thefabric, and which form the bag bottoms.

Having fully described my invention, what 1 claim as new and desire tosecure by Letters Patent is 1. 1n a loom, shed-forming mechanism toeffect the weaving of a tubular fabric, a changecam to alter the normaloperation of a considerable variation in the vlength ofthe bottom strip,and it is ensaid mechanism and cause a `bottoni-forming fabric to bewoven, means, including a segmental rocking member having a fixedfulcrum, to shift said change cam into and out of operative position, aconstantly moving actuating device adapted to coperate at times with therocking member at one or the other side of its fulcrum, to rock it inone or the other direction, anda controlling instrumentality to effectintermittent cooperation of the actuating device with said rocking'member and also to determine whether the latter is to be actuated at oneside of its fulcrum and moved in one direction to operatively positionthe change cam, or at the other side of the fulcrum to be moved inthe'other direction to inoperatively position said cam.

2. In a loom, shed-forming mechanism, including a change cam, to effectthe weaving of sections of tubular fabric and intervening connectingsections of a different weave, means, including a rocking member havinga fixed fulcrum, connected with and to shift said cam into and out ofoperative position, a constantly oscillated actuating device adjacentsaid' member, separate means to intermittingly connect the actuatingdevice and the rocking member at one or the other side of its fulcrumrespectively, to positively rock it in one or the other direction, and acontrolling instrumentality, including a measuring member, to effectthrough one of the said connecting means the cooperation of theactuating device and therocking member of the shifting means at and todefinitely determine the beginning and end of each connecting section offabric.

3. In a bag-loom, shed-forming mechanism, including a set of camsnormally acting to weave a tubularfabric,.and a shiftable cam to breakup such normal action of said cams and effect the weaving of a bottomingfabric, a rocking shifter operatively connected with the shiftable camto move it into and out of operative position, hooked jacks connectedwith the shifter, actuating lingers to coperate with said jacks and rockthe shifter in one or the other direction, and a controllinginstrumentality tov determine which jack is to coperate with and bemoved by its actuatin finger. y f

et. In a loom, shed-forming mechanism to effect the weaving of a tubularfabric, a change cam to alter the normal operation of said mechanism andcause a bottom-forming fabric to be woven, a positively operated andconstantly moving actuating device, shifting meansl for said cam,including a member movable in opposite directions, two separateconnecting devices to connect tem- -Eprarily the actuating device andsaid memr, to movethe latter in one or the other direction and therebyshift the change cam lnto or out of operative position, and acontrolling instrumentality, including a measuring member and acoperating latch, to effect automatically through one or the other ofthe two connecting devices positive movement of said member of theshifting means by the actuating device.

5. Ina loom, shed-formin mechanism, including a change cam, to effectthe weaving of sections of tubular fabric and intervening connectingsections of a different weave, shifting means, including a rockingmember having a fixed fulcrum, to move the change cam into and out ofoperative position, a constantly oscillating actuating device havingfingers moving in unison at opposite sides of the fulcrum of saidrocking member, means to operatively connect said member temporarilywith one or the other finger, to rock said member in one or the oppositedirection, and a controlling instrumentality to determine automaticallywhich iinger of said actuating device shall4 actuate the beginning andending of each section or fabric connecting two tubular sections.l

6. In a loom, shed-formin mechanism,- including a change cam, to e ectthe weaving ofsections of tubular fabric and intervening connectingsections of a diiferent weave, shifting means for the change cam, anotched measuring member, a latch cooperating therewith, meanscontrolled by entrance into and eXit of the latch from the notch toeffect the operation of the-shifting means, and manually adjustablemeans to vary the period in which the latch remains in the notch of themeasuring member.

7. Inaloom,shedforming mechanism, including a change cam, to eifect theweaving of sections of tubular fabric and intervening connectingsections of a different weave, shifting means for the change cam, and acontrolling instrumentality governing the operation of said means, saidinstrumentalw ity including a notched, revolving measuring member, acoperating latch, and manually adjustable means to hasten the eri-.

trance of the latch into the notch.

8. In aloom,shed-forming mechanism, including a change cam, to effectthe weaving of sections of tubular fabric and intervening connectingsections of a different weave, shifting means for the change cam,including a pivotally mounted shifter having connected jacks eachprovided with a hook, oscillating actuating lingers, one for each jackand adapted when coperating therewith, to swing the shifter on itspivot, means to adjust one of the hooks on its jack to advance or delayengagement thereof by its actuating finger, and a controllinginstrumentality operating automatically to move one jack into and theother out of engagement with its actuating linger at predeterminedinterthe rocking member, to thereby fix definitely vals, to therebydetermine the beginning and ending of each strip of fabric connectingtwo tubular sections.

9. In a bag-loom, shed-forming mechanism, including a change cam,shifting means therefor including a pi-voted segment connected with thecam and oppositely movable to effect movement of the cam into and out ofoperative position, hooked jacks connected with the segment at oppositesides of its pivot, connected and oscillating fingers, one for eachjack, and an automatic controlling instrumentality to effect cooperationbetween one ack and its finger and throw the other jack and its fingerout of cooperation at predetermined intervals.

l0. In a bag-loom, shed-forming mechanism, including a change cam,shifting means therefor including a pivoted segment connected with thecam and oppositely movable to effect movement of the cam intoand out ofoperative position, hooked jacks connected with the segment at oppositesides of its pivot, connected and oscillating fingers, one for eachjack, and an automatic controlling instrumentality to effect -coperationbetween one jack and its finger and throw the other jack and' its fingerout of cooperation at predetermined intervals, combined with manuallyadjustable means to vary the duration of the period of operation of thechange cam.

11. In a bag-loom, shed-forming mechanism, including a change cam, arocking shifting member connected therewith, hooked jacks connected withsaid member at opposite sides of its fulcrum, to rock it in oppositedirections, actuating` lingers oscillating in unison and adapted each tocoperate with a jack, and means to effect automatically the cooperationof one jack and its linger and then the other jack and its finger, atpredetermined intervals, the actuation of one jack operativelypositioning the change cam and actuation of the other j ack renderingsaid cam inoperative.

12. In a bag-loom, shed-forming mechanism, including a change cam, arocking shifting member connected therewith, hooked jacks connected'withsaid member at opposite sides of its f` ilcrum, to rock it in oppositedirections, actuating fingers oscillating in unison and adapted each tocooperate with a jack, and means to effect automatically the cooperationof one jack and its finger and then the .other jack and its nger, atpredetermined intervals, the actuation of one jack operativelypositioning the change cam and actuation of the other jack renderingsaid cam inoperative, combined with adjustable means to vary the periodduring which said change` cam is in operative position.

13. In a bag-loom, shed-forming mechanism, including a change cam, arocking shifting member connected therewith, hooked jacks connected withsaid member at opposite sides of its fulcrum, to rock it in oppositedirections, actuating fingers oscillating in unison and adapted each tocoperate with a jack, and means to effect automatically the coperationof one jack and its finger and then the other jack and its finger, atpredetermined intervals, the actuation of one jack operativelypositioiiing the change cam and actuation of the other jack renderingsaid cam inoperative, combined with adjustable means on the jack whichinoperatively positions the change cam to vary the period of operationof such cam.

lll. In a bag-loom, a set of four harnesses and actuating cams thereforoperating in a regular cycle to weave a tubular fabric, a change camacting, when operative, to form a plain weave at the end of each regularcycle, a pivot-ally mounted rocking shifter having a fixed pivot andoperatively connected with the change cam, a single actuating device toact in alternation upon the shifter at opposite sides of its pivot, toswing it positively in one or the other direction and thereby move thechange cam into and out of operation, and a controlling instrumentalityfor said actuating device to cause it to act at one side of the shifterpivot and rock the shifter in one direction and operatively position thechange cam at a predetermined time and thereafter to cause saidactuating device to act upon the shifter at the other side of its pivotand rock the shifter in the opposite direction and render the change caminoperative at the end of a period governed by the controllinginstrumentality.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ARTHUR L. MICHAEL.

Witnesses:

ROBERT JAMIsoN, E. D. OsGooD.

